/*
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 */

package homework.demo04;

/**
 *
 * 2010404126 叶洪
 */
public class CheckIDNumber {
    public static void main(String[] args) {
        String id="452126199006210638";
        boolean flag=true;
        if(id.length()!=18){
            flag=false;
        }
       String numstr="0123456789x";
       for(int i=0;i<id.length();i++){
           char c=id.charAt(i);
           int temp=numstr.indexOf(c);
           if(temp<0){
               flag=false;
               break;
           }
       }
       if(flag)
       {
           System.out.println("是合法的身份证号码");
       }
       else{
           System.out.println("不是合法的身份证号码");
       }
    }

}
